[css-fonts-4] Invalid syntax for 'font-style' property

[pyoor]

The font-style property includes the angle type (deg) in the numerical range of the <angle> type. This is not allowed per CSS value definition syntax.

csswg-drafts/css-fonts-4/Overview.bs

Line 790 in 5a93662

Value: normal | italic | oblique <<angle [-90deg,90deg]>>?

[dbaron]

This sounds like a bug in the value definition syntax; I think the unit should be required, since the unit is required in the actual value. In this case, it would also be much less readable without the unit.

See also #7570, #7572.

[tabatkins]

Invalid, per the fix in #7572.